Burglar-alarm.



F. A. BRUNEL,

BURGLARALARM.

APPLICATION H LED MAY 22. I9|7.

Patented Mar. 4,1919.

FRED A. BRUNEL, OF HEMPSTEAD, NEW YORK.

Specification of Letters Patent.

BURGLABrALABM.

Patented Mar. 4, 1919.

Application filed May 22, 1917. Serial No. 170,261.

To all whomc't may concern:

Be it knownth'at'I, FRED A. BRUNEL, a citizen of the United States, residing at Hempstead, Long Island, in the county of Nassau and State of New York, have invented certain new and useful Improvements in Burglar-Alarms, of which the'following is aspecification.

My invention relates to new and useful improvements in burglaralarms and more particularly to burglar alarms for use in connectionwith windows, and consists primarily of a circuit closing switch adapted to be mounted in the window casing and so arranged that opening of either of the window sashes will actuate the switch to close a signal circuit. i

One of the primary objects of my invention resides in the construction of a compact housing and switch structure which may be conveniently mounted in a pocket formed in the inner face of the side casing so that when not in use, the said structure willnot interfere with the usual operation of the window sashes and so that the switch mechanism will be at all times hidden from view.

Still another object which I have in view is the provision of a switch structure which when closed will be automatically held in closed position so that if the switch is closed through raising of a window byany unauthorized party, the switch will remain closed irrespective of further manipulation of the window. I

With these and other objects in view, my invention will be more fully described, illustrated in the accompanying drawings, and then specifically pointed out in the claims which form a part of this application.

In the drawings l V Figure 1 is a fragmentary elevation of a window structureshowing my burglar alarm in place; r

Fig. 2 is a vertical sectional viewtaken on the line 22,1ooking in the direction of the arrow;

Fig. 3 is a horizontal view taken onthe line 33 of Fig. 1

Fig. 4 is a perspective view of the circuit closer with the face plate of the housing removed.

Corresponding and likeparts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.-

' In order to insure a clear and accurate understanding of my invention, I have-illustrated it in connection with a conventional window casing '10 having the usual inner and outerguide bead 11 and 12 and parting bead 13.

A lower sash 14: having the upper sash bar 15 slides between the beads 11 and 13 while the upper sash 16 having the lower bar 17 slides between the beads .12 and 13, these sash bars overlapping when the window is closed. A portionof the parting bead 13,'immediately above the overlapping sash. bars is removedto provide a chamber 18 communicating with a recess or pocket 19 formed in the inner face of the casing, this chamber and recess providing a space to receive my improved burglar alarm providing circuit closer indicated as a whole by the numeral 20.

This circuit closer has a housing including a body porton 21 and face plate 22, both being preferably formed of sheet metal. The body portion 21 is U-shaped and has its ends reduced to provide tongues 22" which are passed through slots 23 formed in the face plate and-which are then headed over to secure the parts together. 1

The face plate has its ends extended beyond the body 21 to provide attaching ears which receive screws 24 by means of which the housing is secured within the chamber 18 with its face plate flush with the casing.

A shaft 25 has one squared terminal 26 fixed in the intermediate portion of the body 21 and areduced terminal 27 fixed in the intermediate portion of the face plate 22 whereby the shaft is held against any turning movement. I

A pair of flat leaf springs'28 have their ends secured to each other in any suitable manner and their intermediate parts are spread apart to engage against opposite sides of the intermediate portion of the shaft 25 which is squared. as shown at 29, so as to frictionally lock the switch blade formed by these springs in either vertical or horizontal position.

Preferably the intermediate portionof one spring at its side edges has rearwardly bent notched ears which straddle the shaft and hold the switch blade against longitudinal movement. 7 r V y A binding post 31 is secured to and in electrical engagement with 'the body 21 of the housing and a second binding post'32 is secured both to the face plate and body of the housing, being insulated from both as shown in Fig. 1.

The wire-receiving terminals and the abutting ends of these binding posts proJect into the recess l9 and wires 33 connected to them are led to any suitable source of electrical energy and any suitable electrically operated signal devices, not shown. As shown in Fig. 4:, the switch blade in vertical position, engages at one end agamst the binding post 32 and at its opposite ends against one of the ears 22 of the houslng so that in such position the binding post will be electrically connected through the switch blade to the "housing.

When the burglar alarm is installed, the inner face of the adjacent sidebar of the upperv sash 16 is cut away to provide a recess or pocket 34 which. will receive one end of the switch blade when such blade is in horizontal position, as shownin Fig. 2. By reference to this figure a ready understanding'of the operation of the alarm may be had. Obviously, if the lower sash 14 1s raised the sash bar 15 will engage the inner end of the switch blade and swing it to vertical position to close the alarm circuit. In like manner. if the upper sash 16 is lowered, the switch blade will be engaged by the wall of the pocket 34 and will be swung to vertical position. Inasmuch as the switch blade will be frictionally held in vertical position when swung to such position, the circuit will remain closed, irrespective of further manipulation of the window sashes and can again be swung to horizontal or open position only by closing the window and then manually engaging the switch blade.

Although I have illustrated and described my invention in all its details, it will be understood that I reserve the right to make any changes which may fall within the scope of the appended claims.

Having thus described the invention, what is claimed as new is:

1. In a burglar, alarm, the combination with a window casing and upper and lower sashes, of a circuit closer adapted to be mounted in the casing and having a movable switch blade resiliently held to frictionally resist movement and adapted to be engaged and moved to active position by either sash upon -movement of such sash toward open position.

2. In a burglar alarm, a window .casing including guide beads and a parting bead, a port-Ion of the parting bead being removed, upper and lower sashes movable at either side of the parting bead and having sash bars which overlap in closed position of the window, the upper sash being formed with a pocket adjacent the cut-away porsash and at its other end in the path of movement of the lower sash.

3. In a burglar alarm, a window caslng including guide beads and a parting head,

a portion of the parting bead being removed, upper and lower sashes movable at either side of the parting bead and having sash barswhich overlap in closed position of the window, the upper sash being formed with a pocket adjacent the cut-away portion of the parting bead, and a circuit closer mounted in the cut-away portion of the bead and including a switch blade adapted in open position of the circuit closer to project at one end in the pocket of the upper sash and at its other end in the path of'movement of the lower sash, said switch blade being resiliently urged-to automatically and frictionally lock in either its active or inactive positions.

4. In a burglar alarm a circuit closer including a housing binding posts. carried by the housing, one in electrical engagement therewith and the other insulated there from, a pivot shaft fixed in the housing and having a square portion, and a pair of leaf springs having their ends secured to each other and their intermediate portions engaging against opposite sides of the squared portion of the shaft whereby in one position the switch blade formed by these springs will project at its ends laterally from-the housing while in its other position it will be disposed longitudinally of the housing with one end engaging the housing and the other end engaging that binding post insulated from the housing.

5. In a burglar alarm, the combination with a window casing and upper and lower sashes, of a circuit closer including a body portion mounted upon the casing, a binding post carried by the body portion and electrically connected therewith, a pivot shaft in electrical contact with the body portion and formed with angularly disposed faces, and a switch blade including complemental resilient members bowed around the shaft at opposite sides thereof to 'trictionally co act with said faces, said blade bein ,movable by either sash upon the shifting of such sash toward open position to engage with the binding .post forclosing a circuit through the switch :blade.

6. In a burglar alarm, the combination with an inner casing and upper and lower sashes, of a circuit closer including a body portion mounted upon the casing, a pivot shaft carried thereby and provided with angularly disposed faces, a switch blade against longitudinal movement with respect pivoted upon the shaft and formed of comto the shaft, the blade being movable to acplemental resilient members bowed about tive position by either sash upon the shift- 10 the shaft at opposite sides thereof to fricin of such sash toward open position.

5 tionally coact with said faces, and means in testimony whereof I affix my signature.

carried by one of said members and coact ing with the shaft for holding the blade FRED A. BRUNEL. [L.s.]

five cents each, by addressing the Commissioner of latent,

Copies of this patent may be obtained for Washington, D. 0. 

